Interrupter for ignition systems



June 26, 1 934. w. WALTHER ET AL 1,964,697

INTERRUPTER FOR IGNITION SYSTEMS Filed Dec. 5, 1951 Patented June 26, 1934 PATENT OFFICE I 1.904.091 m'rsaaur'rsa ron IGNITION srs'rsus Wilhelm Walther, Stuttgart,

' assignors to Robert Bosch Cannstatt, Germany,

and Alfred Grub,

Aktiengesellschatt, Stuttgart, Germany v Appllcationnecember 5, 1931, Serial No. 579,280

December 19,

comm. '(cl. zoo-m The invention relates'to a double interrupter or circuit-breaker for the ignition apparatusoi internal combustion engines in which each interrupter is arranged as a reserve for the other.

I Each interrupter, in this arrangement, may be intended only for one and the same ignition circuit, or each may belong to a separate circuit.

An object of the invention .is to put one of the two interrupters out of action when the other is 10 working, so that it may not be'subiect to mechanical wear. r

In a double interrupter, the rocking levers of which are arranged side by side in the axial direction of the cam, it is already known tempois rarily to lift one of the two interrupter levers from the rotary cam by a rocking device when the other lever is in the working position.

According to this invention, in a double interrupter, the individual interrupter which are so staggered on the periphery of the cam, an advantageous arrangement for the purpose mentioned is attained by the rocking levers of the interrupters being adapted to be turned by rods on their pivots in such a way that one of the interrupters is moved out oi contact with the cam.

An example of construction of the invention is shown in the drawing, in which:-

Figurelisa planviewotoneiormotadcuble interrupter.

Figure 2 an elevation of the change-over switch arrangement. J

Figure 3 an elevation of the change-over switch rods with the rocking levers.

Figure 4 a side view of the operating handle of the change-over switch.

Figure 5 shows the change-over switch handle in end view. a

On the-interrupter plate la're flxed two angular supports 2, 3 for the stationary contacts 4, 5. The corresponding movable contacts 6, '1 are mounted on springy bands 8, 9, which are flrmly connected with blocks 10, 11 ct insulating material. The blocks are capable of rocking about pivots 12, 13, and are controlled by springs 14, 15 tending to turn them in'known manner towards the stationary contacts. The spring bands 8, 9, are bent at one end to form projections 16, 1'1, springs 14, 15 tendins'to presssaid projections against the interrupter cam. Arms 18, 19 are revolubly mounted on the pins 12, 13 which arms engage by means of upwardly curved projections 20, 21 in slots 22, 23 in the block 10, 11. The ends of the arms are pivotally connected with a link 24. The link has an upwardly-bent lug 25, provided withaslot26. Inthisslotapinflo! the operating handle 28 of a change-over switch. This pin is eccentrically arranged on a pin 29 which is mounted in the wall 30 oi the interrupter casing and held in position by a disc 31. On the outer side of the casing is a semi-circular flange 0O 32 with steps 33, 34 at its ends. This flange 32 at- !ords a slide path for a pin 35 connected with the changeover switch operating knob or handle, which in the end podtions can snap into depressions 36 on the flange 32 and so prevent the switch handle altering in position owing to vibrations.

In order to make the second interrupter as complete a substitute as possible, the reserve interrupter is arranged in another plane than the actual driving interrupter, so that when it is we brought into use it has its own intact or unworn cam track. A distance piece 37 is therefore inserted between the base-plate 1 and the arm 18.

The interrupter plate 1, after all the parts are secured to it, can be inserted in the casing 30, I which is indicated in Figure 1. Alter the insertion of the plate, the change-over switch operating handle 28, 29 is inserted in the opening 38 oithecasing. Byturningthehandlealink24 and with it the arms 18, 19 are moved to and fro. so

We declare, that what we claim is:

1. An interrupter tor ignition systems comprising operating cam means, a pair of flxed contacts, a pair oi. flxed pivots, a pair of rocking levers mounted about said pivots, contacts ll on said rocking levers, springs tending to bring said flxed'and movable contacts together, operating levers mounted about said pivots and engaging said rocking levers, a yoke connecting said operating levers, and means to displace said 00 yoke to move one or the other of said rocking levers out of range of said cam means.

2. An interrupter for ignition systems comprising operating cam means, a pair of flxed contacts, a pair oi'flxed pivots, a pair of rocking 96 levers mounted about said pivots, contacts on said rocking levers, springs tending to bring said flxed and movable contacts together, operating levers mounted about said pivots and said rocking levers, a yoke connecting said oper- I ating levers, an operating knob and an eccentric pin thereon said yoke to'displace it asdesiredtomoveoneortheotheroisaidrockingleversoutoirangeotsaidcammeans.

3. An intermpterior ignition comprisingoperaflngcammeanaapairoiflxedcom. taetaapairotflxedpivotaamirotrocking levers mounted about said pivots, contacts on said rocking levers, springs tending to bring said flxed and movable contacts together. operatim "I levers mounted about said pivots and engaging said rocking levers, a yoke connecting said operating levers, means to displace said yoke to move one or the other 01' said rocking levers out or range of said cam means, and locking means preventing accidental displacement of said yoke.

4. An interrupter for ignition systems comprising operating cam means, a pair of fixed contacts, a pair 01' fixed pivots, a pair 01 rocking levers mounted about said pivots, but in parallel planes so that each of said levers engages a separate portion axially of said cam means, contacts on said rocking levers, springs tending to bring said fixed and movable contacts together, operating levers mounted about said pivots and engaging said rocking levers, a yoke connecting said operating levers, and means to displace said yoke to move one or the other of said rocking levers out of range of said cam means.

5. An interrupter for ignition systems comprising operating cam means, at least a pair of fixed contacts, a pair of fixed pivots, a pair of rocking levers mounted about said pivots, contacts on said rocking levers, springs tending to bring said fixed and movable contacts together, operating levers mounted about said pivots and engaging said rocking levers, and means to swing said operating levers simultaneously to move one or the other 0! said rocking levers out of range of said cam means.

6. An interrupter for ignition systems comprising cam means, at least a pair oi fixed contacts, a pair of fixed pivots, a pair of levers on said pivots carrying contacts cooperating with said fixed contacts, means urging said fixed and movable contacts together, and means mounted about said pivots and connecting said plvoter levers for moving one or the other of said levers out of the range of said cam means. 

